General Samsung S21, S21+, and S21 Ultra U1 Firmware (Links)

[apkfl2817]

What benefit do we get from this version? Wondering whether is would give the ability to use dual SIM on AT&T...

Same My SIM problem, Is this version useful or does it cause problems? Does it allow dual SIM on AT&T? I am wondering if that will be possible.

 

[dtomlin]

Same My SIM problem, Is this version useful or does it cause problems? Does it allow dual SIM on AT&T? I am wondering if that will be possible.

For me, on AT&T, there is an option to add esim under Sim card manager after flashing U1 firmware.

 

[sketchscarz]

Am I able to flash the U1 with odin? or another firmware that will get me back to bl v1? I do see its snapdragon which is me.

I jsut dont want to brick it. and make sure to back up with smart switch

also was trying to capture the OTA https://forum.xda-developers.com/t/...for-s21-plus-ultra-download-ota-link.4333487/ I know this is for exynos but i figured i could try andworkaround it and i jsut cant get the CA certificate to install from canary.

ive been looking up how to enable oem unlock through adb, but i get this error:

C:\Program Files (x86)\Tiny ADB and Fastboot>adb shell
p3q:/ $ am start -n com.android.settings/.DevelopmentSettings
Starting: Intent { cmp=com.android.settings/.DevelopmentSettings }
Error type 3
Error: Activity class {com.android.settings/com.android.settings.DevelopmentSettings} does not exist.
p3q:/ $

ADB Serial Number : R5CR92XSSFJ
Model Name : SM-G998U
Device CodeName : P3Q
Hardware : QCOM LAHAINA
Modem Board : SM8350
HW Version : REV1.0
BL version : G998USQS5BVA6
AP version : G998USQS5BVA6
CP version : G998USQS5BVA6,G998USQS5BVA6
CSC version : G998UOYN5BVA6
Android version : 12
Build date : Fri Jan 21 15:31:25 KST 2022
Country : USA
Serial Number : N/A
Carrier : VZW
SIM State : LOADED,NOT_READY [UNLOCKED]
Debug Level : 0x4f4c
CP Debug Level : 0x55FF
Warranty VOID : 0
SIM operator : Verizon , [311480,]
USB Settings : MTP,CONN_GADGET,ADB

 

[sketchscarz]

So i spoke with samsung technical support through chat and withdrew from the ui 4.0 beta program, which is something that is offered to you as a samsung customer. They said a rollback for snapdragon will be offered to us in future OTAs IF you withdraw from beta ui 4.0, and a bootloader unlock will be available, or you could go to a best buy or samdung store to get it flashed with their equipment. They also said beta UI 4.0 is possible to rollback to a backup through smart switch or flash with odin to u1 or version 1.

 

[sketchscarz]

[S21] OneUI 4 / Android 12 Beta Mega Thread

Howdy y'all, I hope you're all doing well. If you're reading this, I think it's safe to say that your pretty darn excited for One UI 4 w/ Android 12! I'm so excited that we get to share the latest and greatest experience Samsung has to offer, together. With the One UI 4/Android 12 beta now...

us.community.samsung.com

 

[sketchscarz]

Will i lose the unlock and esim? Honestly, from what I've read, I may not even need to unlock bl. It runs fricking great and is really fast data.. I get like 90 MB/s.. And have got the 120 hz to not flicker by using adb tools.. It does not get hot at all, even when crypti mining with xmrig in termux. Debloated and dont have carrier bloat either. Only thing i need is a new screen it got cracked up in the right hand and bottom right corner. Super unfortunate but at least it's just the glass... Only reason I would need to root is to overclock because of the super slipstreamed system and battery life.. I bet u i can over clock somehow with adb function.

 

[sketchscarz]

Will i lose the unlock and esim? Honestly, from what I've read, I may not even need to unlock bl. It runs fricking great and is really fast data.. I get like 90 MB/s.. And have got the 120 hz to not flicker by using adb tools.. It does not get hot at all, even when crypti mining with xmrig in termux. Debloated and dont have carrier bloat either. Only thing i need is a new screen it got cracked up in the right hand and bottom right corner. Super unfortunate but at least it's just the glass... Only reason I would need to root is to overclock because of the super slipstreamed system and battery life.. I bet u i can over clock somehow with adb function.

Anyone know where to get a cheap screen replacement besides alibaba or Amazon?

 

[death365]

 

[sketchscarz]

I goy vzw unlocked dual sim snapdragon . Dont wanna flash anything until im sjrefire itll include my esim

 

[Nicksr2016]

Have a Verizon branded 998U, phone is unlocked from carrier. When I try to insert a att sim in the device it's att locks my data on my sim with a data blocker. They tell me the imei is trying to register a 2g or 3g device. The wired thing is my esim imei shows att showsy.device is a s21 ultra. Is there anyways I can get this device to work on the att network. Att says they shut down 3g and there's no way around it. I was thinking of I flashed my s21 ultra with the unlocked version with that somehow get a different response when the imei tried to register on the att network? Any advice is greatly appreciated, I also have a s22 ultra but I would like to have my s21 ultra be able to work on either network being I have Verizon and att.

 

[dpw2atox]

I just got the CVC4 update with One UI 4.1 on my S21 Ultra unlocked.

 

[bodomfan]

I just got the CVC4 update with One UI 4.1 on my S21 Ultra unlocked.

Exynos?

 

[dpw2atox]

Exynos?

No snapdragon, the S21 Ultra US Unlocked model which is 998U1

 

[death365]

Xxa code ?

 

[aimanfaeiz]

Hows

Hi,

This is the first time I'm trying to update Android phone manually. Reason is I'm from Malaysia and I imported the device from US as I prefer the snapdragon chip. However I found that I'm not able to update my device using OTA and I'm stuck at May 1 update.

Below is my device info. I'm new to this, so first question is can I flash this U1 firmware and second question is can get OTA for future updates once I flash to U1?

Thank you

What is the update? Do u get volte?

 

[kelv_awesome]

Hows

What is the update? Do u get volte?

Yes I'm on one ui 4.1 now and yes I do get volte with my carrier.

 

[aimanfaeiz]

Yes I'm on one ui 4.1 now and yes I do get volte with my carrier.

Great.. can you share with me which firmware did you flash.. my s21 ultra got sm-998u1 model number and currently on one ui 4.1 but got no volte.. im confused which firmware should i flash.

 

[kelv_awesome]

Great.. can you share with me which firmware did you flash.. my s21 ultra got sm-998u1 model number and currently on one ui 4.1 but got no volte.. im confused which firmware should i flash.

We're on the same firmware I believe. I think it must be your carrier side.

 

[aimanfaeiz]

We're on the same firmware I believe. I think it must be your carrier side.

I see.. what carrier do u use? Maxis, celcom or digi

 

[kelv_awesome]

I see.. what carrier do u use? Maxis, celcom or digi

I'm using digi.